Hey Vasil,
You can indeed use The Events Calendar in another language.
There are a few things to learn, unfortunately, but we have three articles that should help. Those articles are here:
• Translating The Events Calendar: http://theeventscalendar.com/knowledgebase/translating-the-events-calendar/
• Translating our premium add-ons: https://theeventscalendar.com/knowledgebase/adding-or-updating-a-translation/
• Changing the language on your site: https://theeventscalendar.com/knowledgebase/changing-the-language-on-your-calendar/
Please check out those articles and follow their steps—it should help!
Cheers,
George